STMicroelectronics STM32L476, User Manual

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Power consumption measurements UM1879
36/41 UM1879 Rev 4
The total measured power consumption of the STM32L476 Discovery board is 287 µA,
which is as expected.
Table 9 gives for each peripheral the theoretical power consumption value. It is extracted
from the vendor’s product datasheet. The typical values are given under the same
conditions as used for the power consumption measurement (see
Figure 20: Power
consumption tree ). Refer to those product datasheets for more details about the conditions.
The theoretical total power consumption of the STM32L476 Discovery board is ~295 µA.
Table 9. Typical power consumption of the STM32L476 Discovery board
MB1184-C01
component
Typical
theoretical
consumption
(µA)
Conditions
LD3985M25R_U12 85 On mode: VINH = 1.2 V
TSZ122IST_U10 58 -
Differ 11 Current in R40 + R42
Differential - 11 Current in R47 + R50
CS43L22_U13 0 Reset pin 32 and all clocks and lines are hold Low
MP34DT01_U17 33 IddPdn, input clock in static mode
N25Q128A13EF840E_U16 14 Standby current
L3GD20_U7 5 IddPdn, Supply current in power-down mode
LSM303CTR_U6 10 IddPdn, current consumption in power-down mode
TSZ122IST_U11 58 -
Bridge Op Amp 10 Current in R48 + R49
MFX_U8 0.3
Standby mode. All GPIOs in ‘Analog Input’ except
WAKEUP input with external PD (R34)
STM32L476VGT6_U9 0.3
Standby mode, GPIOs configuration described
above
TOTAL STM32L476
Discovery board
295.6 -